================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_filldir fs/ntfs/dir.c:1021 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_readdir+0xeaa/0x2b80 fs/ntfs/dir.c:1200 Read of size 1 at addr ffff8880265347f1 by task syz-executor.3/3003 CPU: 0 PID: 3003 Comm: syz-executor.3 Not tainted 6.7.0-rc5-syzkaller-00134-g3f7168591ebf #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x142/0x170 mm/kasan/report.c:588 ntfs_filldir fs/ntfs/dir.c:1021 [inline] ntfs_readdir+0xeaa/0x2b80 fs/ntfs/dir.c:1200 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:67 iterate_dir+0x1cd/0x540 fs/readdir.c:106 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents+0x1ef/0x4c0 fs/readdir.c:307 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f0875a7cba9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f087685a0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f0875b9bf80 RCX: 00007f0875a7cba9 RDX: 00000000000000e0 RSI: 00000000200002c0 RDI: 0000000000000008 RBP: 00007f0875ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0875b9bf80 R15: 00007ffcbaad4a18 Allocated by task 3003: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc+0xb3/0x1a0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] ntfs_readdir+0x832/0x2b80 fs/ntfs/dir.c:1162 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:67 iterate_dir+0x1cd/0x540 fs/readdir.c:106 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents+0x1ef/0x4c0 fs/readdir.c:307 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff888026534780 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 57 bytes to the right of allocated 56-byte region [ffff888026534780, ffff8880265347b8) The buggy address belongs to the physical page: page:ffffea0000994d00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26534 ksm flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888012c41640 ffffea00019400c0 dead000000000007 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 4512, tgid 4512 (udevd), ts 604621610971, free_ts 604621356244 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312 __alloc_pages+0x255/0x680 mm/page_alloc.c:4568 alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133 alloc_slab_page+0x6a/0x170 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc8a/0x1330 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x21d/0x300 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa2/0x1a0 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x530 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x598/0x5e0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771 security_file_open+0x63/0xa0 security/security.c:2836 do_dentry_open+0x327/0x1590 fs/open.c:935 do_open fs/namei.c:3622 [inline] path_openat+0x2849/0x3290 fs/namei.c:3779 do_filp_open+0x234/0x490 fs/namei.c:3809 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 skb_free_frag include/linux/skbuff.h:3260 [inline] skb_free_head net/core/skbuff.c:960 [inline] skb_release_data+0x6a1/0x850 net/core/skbuff.c:992 skb_release_all net/core/skbuff.c:1058 [inline] __kfree_skb+0x57/0x70 net/core/skbuff.c:1072 tcp_rcv_established+0x107a/0x1fc0 net/ipv4/tcp_input.c:6087 tcp_v4_do_rcv+0x6bd/0xb60 net/ipv4/tcp_ipv4.c:1906 tcp_v4_rcv+0x2cba/0x35c0 net/ipv4/tcp_ipv4.c:2329 ip_protocol_deliver_rcu+0x208/0x3f0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2b6/0x500 net/ipv4/ip_input.c:233 NF_HOOK+0x3a1/0x450 include/linux/netfilter.h:314 dst_input include/net/dst.h:461 [inline] ip_sublist_rcv_finish+0x1b5/0x200 net/ipv4/ip_input.c:580 ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline] ip_sublist_rcv+0x75e/0xaa0 net/ipv4/ip_input.c:639 ip_list_rcv+0x42b/0x470 net/ipv4/ip_input.c:674 __netif_receive_skb_list_ptype net/core/dev.c:5572 [inline] __netif_receive_skb_list_core+0x6b5/0x890 net/core/dev.c:5620 __netif_receive_skb_list net/core/dev.c:5672 [inline] netif_receive_skb_list_internal+0xa19/0xe30 net/core/dev.c:5763 gro_normal_list include/net/gro.h:439 [inline] napi_complete_done+0x310/0x8e0 net/core/dev.c:6103 Memory state around the buggy address: ffff888026534680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888026534700: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888026534780: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ^ ffff888026534800: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888026534880: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================